dari 24-27 makai cara

Mapel : Matematika
Materi : Bangun Ruang

24. Luas permukaan balok = 2(pl + pt + lt)
Lp = 2 [(20 × 50) + (20 × 18) + (50 × 18)]
Lp = 2 [1000 + 360 + 900]
Lp = 2 [2260]
Lp = 4520 cm²

(D)


25. Volume tabung = π × r² × t
V = 22/7 × 7 × 7 × 20
V = 3080 cm³

(B)


26. C

27. Volume kubus = s³
V = 5³
V = 125 cm³

Volume balok = p × l × t
V = 9 × 5 × 18
V = 810 cm³

Volume gabungan = 125 cm³ + 810 cm³ = 935 cm³

(C)



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